Nanofluidic Trapping of Faceted Colloidal Nanocrystals for Parallel Single-Particle Catalysis
Artikel i vetenskaplig tidskrift, 2022
Catalyst activity can depend distinctly on nanoparticle size and shape. Therefore, understanding the structure sensitivity of catalytic reactions is of fundamental and technical importance. Experiments with single-particle resolution, where ensemble-averaging is eliminated, are required to study it. Here, we implement the selective trapping of individual spherical, cubic, and octahedral colloidal Au nanocrystals in 100 parallel nanofluidic channels to determine their activity for fluorescein reduction by sodium borohydride using fluorescence microscopy. As the main result, we identify distinct structure sensitivity of the rate-limiting borohydride oxidation step originating from different edge site abundance on the three particle types, as confirmed by first-principles calculations. This advertises nanofluidic reactors for the study of structure-function correlations in catalysis and identifies nanoparticle shape as a key factor in borohydride-mediated catalytic reactions.
first-principles calculations
single nanoparticle catalysis
nanofluidics
fluorescence microscopy
nanoparticle trapping
colloidal Au nanocrystals
Författare
Sune Levin
Chalmers, Biologi och bioteknik, Kemisk biologi
Sarah Lerch
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Astrid Boje
Chalmers, Fysik, Kemisk fysik
Joachim Fritzsche
Chalmers, Fysik, Kemisk fysik
Sriram Kesarimangalam
Chalmers, Biologi och bioteknik, Kemisk biologi
Henrik Ström
Chalmers, Mekanik och maritima vetenskaper, Strömningslära
Norges teknisk-naturvitenskapelige universitet
Kasper Moth-Poulsen
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Institucio Catalana de Recerca i Estudis Avancats
Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)
Henrik Sundén
Göteborgs universitet
Chalmers, Kemi och kemiteknik, Kemi och biokemi
Anders Hellman
Chalmers, Fysik, Kemisk fysik
Fredrik Westerlund
Chalmers, Biologi och bioteknik, Kemisk biologi
Christoph Langhammer
Chalmers, Fysik, Kemisk fysik
ACS Nano
1936-0851 (ISSN) 1936-086X (eISSN)
Vol. 16 9 15206-15214Sub-10 nm Utmaningen inom Katalys på Enskilda Nanopartiklar
Vetenskapsrådet (VR) (2018-00329), 2019-01-01 -- 2024-12-31.
Ämneskategorier
Annan kemi
Biokatalys och enzymteknik
Organisk kemi
DOI
10.1021/acsnano.2c06505
PubMed
36054658